body {
    background: #e8dede;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    user-select: none;
}
.w1200 {
    width: 1200px;
    margin-left: auto;
    margin-right: auto;
}
.mw1200 {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}
/* ================= header start ================= */
#header {
    height: 64px;
    background: #141414;
    color: #fff;
    line-height: 64px;
}
/* ========= logo start ============ */
#header .header-contain .logo {
    width: 235px;
    height: 64px;
    float: left;
}
.header-contain .logo .logo-title {
    display: block;
    font-size: 0;
    width: 100%;
    height: 100%;
    background: url(https://www.python.org/static/img/python-logo.png) 0 -8px;
}
/* ========= logo end ============ */

/* ========= nav start ============ */
#header .header-contain .nav {
    float: left;
    margin-left: 40px;
}
.header-contain .nav .menu {
    width: 380px;
    display: flex;
    justify-content: center;

}
.nav .menu li {
    height: 64px;
    padding: 0 20px;
    box-sizing: border-box;
}
.nav .menu li a{
    display: block;
    font-size: 15px;
}
.nav .menu li:hover {
    background: #0e0e0e;
    border-bottom: 4px solid #a7ca1b;
}
.nav .menu li.active {
    background: #0e0e0e;
    border-bottom: 4px solid #a7ca1b;
}
/* ========= nav end ============ */
/* ========= login start ============ */
.header-contain .login-box {
    float: right;
}
.login-box .py-user {
    font-size: 30px;
}
.login-box span{
    vertical-align: 4px;
}
.login-box .login:hover, .reg:hover {
    text-shadow: 1.5px 1.5px 3px rgba(255, 255, 255, 0.88);
}
.login-box .author {
    float: right;
    position: relative;
    cursor: pointer;
}

.login-box .author .author-menu {
    display: none;
    width: 120px;
    position: absolute;
    top: 64px;
    left: -15px;
    background: #fff;
    text-align: center;
    line-height: 45px;
    box-shadow: 0 1px 2px #ccc;
    border-radius: 5px;
    z-index: 1;
}

.login-box .author .author-menu li a {
    display: block;
    color: #7493c5;
}

.login-box .author:hover .author-menu {
    display: block;
}

.login-box .author .author-menu li:hover {
    background: #e4e4e4;
}

.login-box .author .author-menu::after {
    content: "";
    border: 12px solid transparent;
    border-bottom-color: #fff;
    position: absolute;
    top: -24px;
    left: 50px;
}
/* ========= login end ============ */
/* ================= header end ================= */

/* ================= footer start ================= */
#footer {
    background: rgb(83, 94, 103);
}
#footer .footer-box {
    text-align: center;
    color: #c1c1c1;
}
#footer .footer-box .footer-content {
    height: 120px;
    line-height: 30px;
    padding-top: 25px;
    padding-left: 60px;
    box-sizing: border-box;
    background: url(https://www.python.org/static/img/python-logo.png) no-repeat 50px 20px;
}
.footer-content .top-content .link {
    margin-right: 23px;
}
.footer-box .footer-content .top-content span.about-me .py-wechat {
    font-size: 24px;
    color: #fff;
    vertical-align: -4px;
}
.footer-box .footer-content .bottom-content span:first-child {
    margin-right: 20px;
}
#footer .footer-box .copyright-desc {
    line-height: 60px;
    background: rgb(55, 60, 70);
}
/* ================= footer end ================= */
